Machine for milling cams.



- Patented 000.10, mm.

H .1 scHmcK MACHINE FOR MILLING CAMS.

(Application filed Apr. 80, 1901.) (No Model.

4 Sheets-Shut l.

INVENTOH' 4 MIA/58s; I

No. 688,344. Patented Dec. I0, I90].

H. J. SGHMICK.

MACHINEv FOR MILLING CAMS.

(Lpplipltion Med Apr. 80, 1901.) (N0 H 4 Sheets-Sheet 2.

WITNESSES fl/ IN VENTOH d025 WM I BY I v I ATTOAHNEY Y No. 688,344 Patafited Dec. l0, I90l. n .1 SCHMICK MACHINE FOB MILLING CAMS.

(Application filed Apr. 80, 1901.)

4 Sheets-Sheet 3.

I (No mum INVENTOI? y i i? A7TOHNEY WITNESSES:

No. 688,344. I Patented Dec. I0, 1901.

H. J. SCHMICK.

MACHINE FOR MILLING CAMS.

(Application filed Apr. 80 1901.) (No Model.) 4 Sheets-Sheet 4.

' 'W/TNESSES. VENTOH I UNITED STATES PATENT OFFICE.

HENRY J. SCHMIOK, OF HAMBURG, PENNSYLVANIA.

MACHINE FOR MILLING CAMS.

SPECIFICATION forming part Of Letters Patent NO. 688,344, dated. December 10, 1901.

Application filed April 30, 1901. Eerial No- 58,191. (No model.)

To all whom, it may concern:

Be it known that I, HENRY J. SCHMICK, a citizen of the United States, residing at Hamburg, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Milling Cams; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to metal working machines, has especial reference to machines for milling radio-helical cams, and consists in certain constructions which will be fully disclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification, Figure 1 represents a top plan view of my invention; Fig. 2, a side elevation of the milling device detached from the lathe; Fig. 3, a vertical longitudinal section of the same on line 3 3, Fig. 1; Fig. 4, a vertical transverse section, partly in elevation, on line 4 4, Fig. 1, looking in the direc tion of the arrow; Fig. 5, an enlarged end view of the cam on line 5 5, Fig. 6; Fig. 6, a side elevation of the cam and its supportingshaft, showing the pinions thereon, and Fig.

7 a like view showing the pinions of equal diameter with the cam.

Reference being had to the drawings and the numerals thereon, 1 and 2 indicate the sides of the frame of the milling device, connected at their opposite ends by transverse members 3 and 4, which securely hold the sides together. In the. sides are longitudinal slots 5, through which the shaft of the cam extends on each end thereof, and a shaft 6 supports the milling-tool 7, which may be provided with any desired number of cutters to correspond with the number of dwells or work 'ing faces on the cam to be milled. These cutters 8 areof different diameters to correspend with the diameters of the dwells on the cam. The shaft 6 is supported in the sides 1 and '2, and one end thereof engages the chuck 9 of a lathe or other power device, and the opposite end engages the center 10 of the lathe tail-stock, as shown in Fig. 1. The

frame rests upon a table 11 on the bed 12 of the lathe. i

It is obvious that other means may be readily substituted for driving the milling-tool, the present application being used only to show one of the many forms that may be used.

On each side of the frame are vertical posts 13 14 at oneend and 15 16 at the opposite end. These posts are provided at each end with an elongated slot 17 and are secured to the sides 1 and 2-by a pin 18 and a screw-bolt 19 or in any other preferred manner.

20 and 21 are oppositely-toothed rack-bars adj ustably secured to the posts by screw-bolts 22, which extend through the slots 17, with the head of the bolt resting upon or against one side of the post, as shown in Figs. 1, 2, a d 3- 23 indicates the article to be milled or finished, in this instance a cam, which is provided with dwells or working faces 24, which are coincident withthe cutters 8 0n the milling-tool 7, and on each end of the cam is a shaft 25, which engages the slot 5 in the sides '1 and 2, and each shaft is provided with a pinion 26, on which the cam is supported, and the pinions engage the upper or the lower rack-bars 20 or 21, according to which sideof the cam or set of dwells is being'-finished.

-On one end of the shaft 25 is secured a lever 36, by which the operator revolves the cam and feeds it to the milling-tool 7 to finish the dwells 24. These dwells when finished form a helical path, as-shown in Figs. 6 and 7, and the diameters of the pinions 26 determine the length and angle of the dwells across the cam. Pinions one-half the diameter of the cam produce a length-approximately equal to one-half the diameter of the cam, as shown in Fig. 6, and pinions the diameter of the cam produce a length approximately one-fourth the diameter of the cam, asshown in Fig. 7. These lengths and angles may be varied as desired by the use of corresponding pinions.

It will be observed that the dwells 24 are formed on the wall of the body of the cam. This body being a cylinder, as shown in Fig. 4 and 5, it is therefore obvious that the number of dwells may be varied as conditions require by changing the milling-tool and that the angle of the dwells may be varied by changing the pinions on the shaft of the cam.

what I claim is=- 1. A revolnble milling-tool supported in a frame; in combination with a member supported on pinions in the same frame, and means for feeding the member to the millingtool.

2. A revolnble milling-tool; in combination with a revolnble member, pinions supporting said member, and toothed racks engaged by said pinions.

3. A revolnble milling-tool, and a frame supporting the tool; in combination with a revolnble member engaging said frame, pinions supporting said member, and toothed racks engaged by said pinions.

4. A revolnble milling-tool; in combination with a member revolubly supported on pinions, and racks above and below said pinions and engaged thereby alternately.

5. A revolnble milling-tool; in combination with a revolnble member, interchangeable pinions connected to the article, and toothed racks engaged by said pinions.

6. In a milling-machine for the purpose described,thecombinationofarevolublemilling= cutter supported in a frame, devices guided in said frame to revolubly support and feed the work to the cutter, comprising pinions mounted axially of the work and so as to rotate therewith, and racks engaging said pinions.

7. A revolnble milling-tool having a plurality of cutters in different vertical planes;

in combination with a member having faces coincident with the cutters, pinions supporting said member, and racks engaged by said pinions.

S. A revolnble milling-tool having a plurality of cutters in different vertical planes and of different diameters; in combination with a member having faces coincident with the cutters, pinions supporting said member, and adjustable racks engaged by said pinions.

9. A-revoluble milling-tool having a plurality of cutters in different vertical planes and of diiferent diameters; in combination with a member having dwells in different vertical planes and revolubly supported, and means for feeding the cam to the cutters.

10. A revolnble milling-tool, a frame having slotted members supporting said tool, and racks supported by said frame; in combination with a .revoluble member, pinions connected to the shafts of said member and said shafts engaging said slots in the frame, and the pinions on the shafts engaging said racks.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY J. SCHMICK.

Witnesses:

D. C. REINOHL, W. PARKER, REINoHL. 

